Whirl of Crankshaft Rear End, Part 2: An L4-Cylinder Diesel Engine

Since the sizes of the flywheel and clutch have been enlarged due to downsizing of diesel engines, the mass and moment of inertia at the crankshaft rear end have increased. Consequently, the serious bending stresses have appeared in the crankshaft rear. This paper describes the characteristics of th...

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Bibliographic Details
Published in:SAE International Journal of Engines 2017-10, Vol.10 (4), p.2099-2108, Article 2017-01-1811
Main Authors: Kimura, Jouji, Tanaka, Tatsuya, Hakomoto, Kenjiro, Kawase, Kousuke, Kobayashi, Shinichiro
Format: Article
Language:English
Subjects:
Bending
Bending stresses
Center of gravity
Clutches
Crankshafts
Diesel engines
Diesel motor industry
Downsizing
Flywheels
Moments of inertia
Resonance
Stresses
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Summary:Since the sizes of the flywheel and clutch have been enlarged due to downsizing of diesel engines, the mass and moment of inertia at the crankshaft rear end have increased. Consequently, the serious bending stresses have appeared in the crankshaft rear. This paper describes the characteristics of those serious bending stresses, based on the mechanism for whirl resonance. The whirl resonance is largely impacted by the mass of the flywheel and clutch and by the distance from the crank-journal center of the rear end to the center of gravity of the flywheel and clutch.
ISSN:1946-3936
1946-3944
1946-3944
DOI:10.4271/2017-01-1811